babel-upgrade is broken if you have spaces in user folder.

Hello,
I have a space in my user folder name :
```
C:\Development\test\onsenui-vue-cordova-test > npx babel-upgrade
Error: EPERM: operation not permitted, mkdir 'C:\Users\xarkam'
```
The real folder is `C:\Users\xarkam xarkam\`

Thanks for fix it.

Start by reproducing `npx babel-upgrade` on Windows with a user folder containing a space, using the command and paths shown in the report. Trace the babel-upgrade entry point to find where the user path is split or interpreted, then verify that the command creates or accesses the complete `C:\Users\xarkam xarkam\` path successfully.

Written by the indexing model from the issue text.